The article refers to a digital adventure challenge called “VoIP” in which the user needs to investigate a potential vishing attack after a suspicious call to a friend.
The Voice over Internet Protocol (VoIP) is the technology used for the call which allows voice calls to be made using a broadband Internet connection rather than a regular phone line.
The Session Initiation Protocol (SIP) is used to establish, manage and terminate multimedia sessions such as voice calls and video conferences and is widely used in telecommunications networks.
The Real-time Transport Protocol (RTP) is a network protocol used to deliver audio and video over IP networks.
The challenge requires the user to answer questions based on this information and by filtering and analysing the packets in the traffic.